Buna-N O-Rings

Buna-N (Nitrile) O-Rings

Nitrile butadiene rubber (NBR) is a family of unsaturated copolymers of 2-propenenitrile and various butadiene monomers (1,2-butadiene and 1,3-butadiene).The additives used to accomplish this are NOT always compatible with Buna-N and has resulted in the auto industry upgrading o-rings to Viton® elastomers.

Nitrile® Compounds can exhibit excellent compression set, tear and
abrasion resistance. Unless especially compounded, they do not have good resistance
to ozone, sunlight, or weather. They should not be stored near motors or other ozone
generating electrical equipment. They should be kept from direct sunlight.
Compounds from nitrile rubber can exhibit a temperature range of -65oF to +300oF,
although no one formulation may exhibit the total range.